From the collection Dr. David P. Chandler on the site http://papaintellivision.com/
The documents herein regard the Mattel Electronics Intellivision project ranging from its inception in 1977 until the end of Chandler's involvement with the company in 1983.
This undated document contains a registration card for the Mattel Intellivision the collect information from customers. To incentive the paper being turned in, they offered a check of $2.50 signed by George Plimpton to owners who mailed in their registration card for use towards the purchase of an Intellivision game. These would have been available with new Intellivision purchases starting in 1981.
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